amp-social-share
Description
Usage
Required Scripts
<script async custom-element="amp-social-share" src="https://cdn.ampproject.org/v0/amp-social-share-0.1.js"></script>
Supported Layouts
Usage
The amp-social-share
component displays a social share button for social platforms.
amp-social-share
(including those for the pre-configured providers) have a label/accessible name that is exposed to assistive technologies (such as screen readers). Make sure to include an aria-label
with a descriptive label, as otherwise these controls will just be announced as unlabelled "button" elements. Example: Basic social share button
The share button guesses some defaults for you for some pre-configured providers. It assumes that the current document canonical url is the URL you want to share and the page title is the text you want to share.
<amp-social-share type="twitter" aria-label="Share on Twitter" ></amp-social-share>
Example: Passing parameters
When you want to pass parameters to the share endpoint, you can specify data-param-<attribute>
that will be appended to the share endpoint.
<amp-social-share type="linkedin" width="60" height="44" data-param-text="Hello world" data-param-url="https://example.com/" aria-label="Share on LinkedIn" > </amp-social-share>
Linkedin is one of the pre-configured providers, so you do not need to provide the data-share-endpoint
attribute.
Pre-configured providers
The amp-social-share
component provides some pre-configured providers that know their sharing endpoints as well as some default parameters.
Provider | Type | Parameters |
---|---|---|
Web Share API (triggers OS share dialog) | system |
|
email |
| |
facebook |
| |
linkedin |
| |
pinterest |
| |
Tumblr | tumblr |
|
twitter |
| |
whatsapp |
| |
LINE | line |
|
SMS | sms |
|
Non-configured providers
In addition to pre-configured providers, you can use non-configured providers by specifying additional attributes in the amp-social-share
component.
Example: Creating a share button for a non-configured provider
The following example creates a share button through Facebook Messenger by setting the data-share-endpoint
attribute to the correct endpoint for the Facebook Messenger custom protocol.
<amp-social-share type="facebookmessenger" data-share-endpoint="fb-messenger://share" data-param-text="Check out this article: TITLE - CANONICAL_URL" aria-label="Share on Facebook Messenger" > </amp-social-share>
As these providers are not pre-configured, you'll need to create the appropriate button image and styles for the provider.
Variable Substitution
You can use global AMP variables substitution in the <amp-social-share>
element. In the example below, TITLE
is substituted with the page title and CANONICAL_URL
with the document's canonical URL.
<amp-social-share type="whatsapp" data-param-text="Check out this article: TITLE - CANONICAL_URL" > </amp-social-share>
Attributes
type (required)
Selects a provider type. This is required for both pre-configured and non-configured providers.
data-target
Specifies the target in which to open the target. The default is _blank
for all cases other than email/SMS on iOS, in which case the target is set to _top
.
Please note that we only suggest using this override for email.
data-share-endpoint
This attribute is required for non-configured providers.
Some popular providers have pre-configured share endpoints. For details, see the Pre-configured Providers section. For non-configured providers, you'll need to specify the share endpoint.
data-param-*
All data-param-*
prefixed attributes are turned into URL parameters and passed to the share endpoint.
aria-label
By default, the aria-label
attribute will be populated with Share by type
where 'type' is the type
attribute provided to the component. If a non-empty value is passed in to aria-label
it will overwrite the default value.
Styling
Default Styles
By default, amp-social-share
includes some popular pre-configured providers. Buttons for these providers are styled with the provider's official color and logo. The default width is 60px, and the default height is 44px.
Custom Styles
Sometimes you want to provide your own style. You can simply override the provided styles like the following:
amp-social-share[type='twitter'] { background: red; background-image: url(datauri:svg/myownsvgicon); }
When customizing the style of an amp-social-share
icon please ensure that the customized icon meets the branding guidelines set out by the provider (e.g Twitter, Facebook, etc.)
Accessibility
Indication of focus
The amp-social-share
element defaults to a blue outline as a visible focus indicator. It also defaults tabindex=0
making it easy for a user to follow along as he or she tabs through multiple amp-social-share
elements used together on a page.
The default focus indicator is achieved with the following CSS rule-set.
amp-social-share:focus { outline: #0389ff solid 2px; outline-offset: 2px; }
The default focus indicator can be overwritten by defining CSS styles for focus and including them within a style
tag on an AMP HTML page. In the example below, the first CSS rule-set removes the focus indicator on all amp-social-share
elements by setting the outline
property to none
. The second rule-set specifies a red outline (instead of the default blue) and also sets the outline-offset
to be 3px
for all amp-social-share
elements with the class custom-focus
.
amp-social-share:focus{ outline: none; } amp-social-share.custom-focus:focus { outline: red solid 2px; outline-offset: 3px; }
With these CSS rules, amp-social-share
elements would not show the visible focus indicator unless they included the class custom-focus
in which case they would have the red outlined indicator.
Color contrast
Note that amp-social-share
with a type
value of twitter
, whatsapp
, or line
will display a button with a foreground/background color combination that falls below the 3:1 threshold recommended for non-text content defined in WCAG 2.1 SC 1.4.11 Non-text Contrast.
Without sufficient contrast, content can be difficult to perceive and therefore difficult to identify. In extreme cases, content with low contrast may not be visible at all to people with colour perception impairments. In the case of the above share buttons, users may not be able to appropriately perceive/understand what the share controls are, what service they relate to.
Validation
See amp-social-share rules in the AMP validator specification.
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